This has happened to me several times and each tim ei fix it I vow to record what I did, but each time I forget.
The culprit is :
Code:
if ($current_area != "A" && $current_area!=$usertype && $mode!="checkout") {
echo "Hacking attempt!!!!"; exit;
}
in include/register.php
1) Have you got a hidden field in the form that is named 'mode'?
2) Does it do this if you clear your cookies? - it might be because you are registering as a customer and the usertype recorded in the session is admin.
If all else fails, you could comment out that code and it will go away.
